not sure but it would be highly suspect if they did not think that of all there employees would'nt and two with the discount and all the great growing tips that you would pick up y on earth would anyone want to fuck that up and last but not least if employed by such vendors they would no doubtley prosecute to the full extent of the law if someone were trying to pinch and i imagine the fines and other penalties one would have to deal with after that would be much heavier because its considered a prscription drug and also they would have to prove that they didnt purchase the trees if they were ever caught so idk they would prob have a strict hiring policy and signing of docs and all that jazz